CN108473057A - Method and system for monitoring the electrical isolation resistance in electric system - Google Patents
Method and system for monitoring the electrical isolation resistance in electric system Download PDFInfo
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- CN108473057A CN108473057A CN201580085464.XA CN201580085464A CN108473057A CN 108473057 A CN108473057 A CN 108473057A CN 201580085464 A CN201580085464 A CN 201580085464A CN 108473057 A CN108473057 A CN 108473057A
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- main contactor
- current collector
- conductor
- insulation resistance
- electric system
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
- B60L3/0023—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
- B60L3/0069—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train relating to the isolation, e.g. ground fault or leak current
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L50/00—Electric propulsion with power supplied within the vehicle
- B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
- B60L50/53—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells in combination with an external power supply, e.g. from overhead contact lines
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L9/00—Electric propulsion with power supply external to the vehicle
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
- G01R27/025—Measuring very high resistances, e.g. isolation resistances, i.e. megohm-meters
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/005—Testing of electric installations on transport means
- G01R31/006—Testing of electric installations on transport means on road vehicles, e.g. automobiles or trucks
- G01R31/007—Testing of electric installations on transport means on road vehicles, e.g. automobiles or trucks using microprocessors or computers
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
- G01R31/1263—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation
- G01R31/1272—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation of cable, line or wire insulation, e.g. using partial discharge measurements
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Power Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Sustainable Energy (AREA)
- Sustainable Development (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Computer Hardware Design (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
- Testing Relating To Insulation (AREA)
- Current-Collector Devices For Electrically Propelled Vehicles (AREA)
Abstract
The present invention relates to the method for the electrical isolation resistance in monitoring electric system (3), this method includes：Electric power is supplied from external power supply through the first conductor (5) and the second conductor (6) (4)；Electric power is fed to electric system (3) through the first current collector (7) and the second current collector (8), each of first and second current collectors are configured to be electrically connected to electric system (3) via the first main contactor (10) and the second main contactor (11) respectively；And by associated with control unit (12) and be connected to each insulation resistance monitoring unit (16) in main contactor (10,11) and monitor insulation resistance.Method further comprises：Main contactor (10,11) is maintained to be in closed state when current collector (7,8) is disconnected from conductor (5,6), to allow to monitor insulation resistance；It disconnects main contactor (10,11) and current collector (7,8) is then connected to conductor (5,6)；And it is closed main contactor (10,11), to allow to monitor insulation resistance.The invention further relates to a kind of devices for monitoring the electrical isolation resistance in electric system.
Description
Technical field
The present invention relates to the methods of the electrical isolation resistance in monitoring electric system.This method includes：From external power supply via
First conductor and the second conductor supply electric power；Electric power is fed to the power train via the first current collector and the second current collector
System, each of the first current collector and the second current collector are configured to be electrically connected via the first main contactor and the second main contactor respectively
It is connected to the electric system；And it utilizes associated with control unit and is connected to insulated electro each in the main contactor
It hinders monitoring unit and monitors the insulation resistance.
The invention further relates to the devices of the electrical isolation resistance in monitoring electric system, and the device is via the first conductor and second
Conductor is connected to external power supply.Described device includes：First current collector and the second current collector, each of which are configured to be electrically connected to
The conductor and for via the first main contactor and the second main contactor by the feeding power to the electric system；With
And insulation resistance monitoring unit, it is associated with control unit and each of be connected to the main contactor for prison
Depending on the insulation resistance.
Present invention can apply in the vehicles such as automobile, truck, bus and construction equipment.
Although hereafter the present invention will be described relative to the application of electrobus form, the present invention is not limited to this
Certain types of vehicle, but can be used in other vehicles.The vehicle can be electric vehicle or hybrid vehicle.
Background technology
In vehicular field, become more and more general as the alternative to general internal combustion engine using alternative energy source
Time.Specifically, electric vehicle has become extremely promising scheme.
Electric vehicle can be promoted individually using motor or be promoted using the device including both motor and internal combustion engine.
Latter type is referred to as hybrid vehicle (HEV), and can use as follows, i.e., is used when driving except urban district interior
Combustion engine operates vehicle, and in urban district or in the ring for needing the limitation noxious pollutants such as carbon monoxide and nitrogen oxides discharge
Motor is used in border.In addition, hybrid vehicle uses the electric energy with the rechargeable battery for providing electric power to motor to deposit
Storage system.
In the presence of the other types of vehicle that can be operated using traction units such as motors, for example, tramcar and row
(it is not usually for vehicle (that is, the railroad vehicle run in track on being layed in ground) and bus and haulage vehicle
Rail).Such vehicle can be powered by aerial current conductor, that is, power contacts electric wire, the aerial current conductor formed to
A part for the external power supply of motor supply electric power in vehicle.For this reason, the vehicle is provided with current collector, all
Such as pantograph, it is located on the roof of vehicle and is configured for contacting with the current conductor during operation.At this
In the vehicle of a little types, it is not usually required to any rechargeable battery, because continuously to motor during the operation of vehicle
Power supply.
In short, the vehicle with motor, --- vehicle or hybrid vehicle that motor is used alone --- is needed from outside
Power supply supplies electric power.Electric power is used to energy storage system charge or for directly promoting vehicle.In addition, external power supply can
In the form of common grid power system, it can be accessed via (for example) conventional aerial current conductor (as mentioned above).Alternative
Ground, external power supply can be the separate unit of the power supply particularly suitable as vehicle.
External power supply provides electric power to onboard electric systems, and the purposes of the onboard electric systems is the certain of control vehicle
Electric function, especially for the operation of control motor.
For the vehicle of the electric device with mentioned kind, monitor that the electrical isolation resistance of onboard electric systems is very heavy
It wants.More specifically, it is necessary to monitor and carefully analyze the insulation resistance between (for example) two aerial conductors.Insulation resistance is supervised
Depending on general purpose be to provide control function, indicate the state of the electric system of vehicle, meet specification in particular for control
And any trouble unit that may be needed replacing for identification.For example, the electricity caused by inappropriate insulation or ground connection is absolutely
Edge resistance can not cause parts damages completely and can also become security risk.
In the situation for the vehicle that is related to there is motor and be powered by external power supply, it is generally necessary to monitor onboard electric
It the system i.e. insulation resistance of the first power network and is connected to exhausted between current collector i.e. the second power network of the external power supply
Both edge resistance.Previously known use and the associated insulation resistance monitoring unit of the first power network and related with the second power network
Another insulation resistance monitoring unit of connection monitors the insulation resistance of electric system.It is used for two different power network different exhausted
The fact that edge resistance monitoring unit be based on in the case where multiple monitoring units are connected to same power network its may do
Disturb seeing clearly for mutual measured value.
For this reason, previous schemes are to use trunking, are configured to connect in multiple monitored power network
A monitoring unit is physically disconnected in the case of together.However, this will lead to additional components and fringe cost.In addition,
It may cause about whether the uncertainty for really closing specific insulation monitoring disconnection repeater.If it is not, may nothing
Method accurately detects potential insulation fault.
Based on disadvantages mentioned above, problem associated with the prior art is to reduce the quantity of necessary insulating detection equipment, from
And reduce the cost and complexity of such system.
In addition, patent document JP 2012-223020 teach a kind of system for monitoring the electrical isolation resistance in vehicle,
It has contactor between vehicle and the pantograph for being connectable to external power supply.In addition, electrical isolation detection device can connect
It is connected to pantograph.However, even if JP 2012-223020 are directed to insulation resistance monitoring field, but be still required to using few
Amount insulation monitoring unit monitor insulation resistance in several power network and still provide accurately monitor by improved method and be
System.
Invention content
Thus, the object of the present invention is to provide a kind of improved methods and system for insulation resistance monitoring, are related to having
Cost efficiency and accurate measurement method and device.
In general, above-mentioned purpose utilizes according to claim 1 for monitoring the electricity of the electrical isolation in electric system
The method of resistance obtains.The method includes：Electric power is supplied from external power supply via the first conductor and the second conductor；By the electricity
Power is fed to the electric system, first current collector and second current collector via the first current collector and the second current collector
Each of be configured to be electrically connected to the electric system via the first main contactor and the second main contactor respectively；And profit
The insulation resistance is monitored with insulation resistance monitoring unit, and the insulation resistance monitoring unit is associated with control unit and connects
To each in the main contactor.The method further includes：The master is maintained to connect when current collector is disconnected from the conductor
Tentaculum is in closed state, to allow to monitor insulation resistance；It disconnects the main contactor and is then connected to current collector
Conductor；And the main contactor is closed, to allow to monitor insulation resistance.
Using the present invention, certain advantages are obtained.It mainly may be mentioned that, obtain the improvement side for insulation resistance monitoring
Method, because it provides accurate and cost-effective monitoring using the component of minimum number.
According to embodiment, after the step of current collector is connected to conductor but before the step of being closed main contactor,
The step of the method includes activation precharge units.It is opened this means that precharge unit can be used for providing the special of electric system
Dynamic model formula, wherein the initially electric current of electric power of the limitation from external power supply.By this method, contactor and other Electricity Departments can be protected
Part.According to embodiment, the method includes activating preliminary filling by being closed the switch being connected in parallel with second main contactor
The step of electric unit.
In addition, according to embodiment, the method includes via the first aerial pressure-wire and the second aerial pressure-wire or via
The step of electric power being supplied along the conductor of ground configuration from external power supply.Thus, during the operation of electric system in an efficient way
Electric power is provided from suitable conductor device to vehicle.According to specific embodiment, the present invention is including the use of the first pantograph and second
Pantograph feeds electric power to electric system.Pantograph be on different types of vehicle collected current it is firm and effective
Equipment.
Above-mentioned purpose is also using according to claim 9 for monitoring the electrical isolation resistance in electric system and passing through
The device of external power supply is connected to by the first conductor and the second conductor to obtain.Described device includes：First current collector and second
Current collector, each of which are configured to be electrically connected to the conductor via the first main contactor and the second main contactor and electric power
It is fed to the electric system；And insulation resistance monitoring unit, it is associated with control unit and be connected to the master and connect
Each of tentaculum is to monitor the insulation resistance.It is disconnected from the conductor in addition, described control unit is configured in current collector
When maintain the main contactor to be in closed state, to monitor insulation resistance；For disconnect the main contactor and then
Current collector is connected to conductor；And for being closed the main contactor, to monitor insulation resistance.
The further advantage and favorable characteristics for being described below and disclosing the present invention in appended claims item.
Description of the drawings
Refer to the attached drawing is hereafter the more detailed description of the embodiment of the present invention to being described as example.Wherein
Fig. 1 shows that the simplified perspective view of the vehicle of the present invention can be used；
Fig. 2 is the schematic diagram of the device of monitoring electrical isolation resistance according to the ... of the embodiment of the present invention；
Fig. 3 is corresponding diagram 2 but shows the schematic diagram of the device under the first alternative operating conditions；
Fig. 4 is corresponding diagram 2 but shows the schematic diagram of the device under the second alternative operating conditions；
Fig. 5 is corresponding diagram 2 but shows the schematic diagram of the device under third alternative operating conditions；
Fig. 6 is corresponding diagram 2 but shows the schematic diagram of the device under the 4th alternative operating conditions；
Fig. 7 is the flow chart for the operation for showing the embodiment of the present invention.
Specific implementation mode
The different aspect of the disclosure is described more fully with hereinafter with reference to attached drawing.However, method disclosed herein and being
System can be embodied in many different forms, and be not understood as limited to aspect set forth herein.
Initial reference Fig. 1 shows the simplified perspective view of the vehicle of 1 form of bus, and the vehicle is according to the implementation
Example is configured to operate using motor 2.In addition, motor 2 is associated with onboard electric systems 3, the onboard electric systems 3 exist
It schematically shows and will be described in more detail below in Fig. 1.
The purposes of electric system 3 is to control the electric propulsion of vehicle 1 by distributing electric energy in a suitable manner, and also control
The operation of motor 2 and other associated components processed.In addition, electric system 3 is arranged to other auxiliary power portions into vehicle 1
Part heats and the offer electric power such as ventilation equipment.For this purpose, using the electric current from external power supply 4 to electric system
3 power supplies.More precisely, external power supply 4 includes the first current conductor 5 and the second current conductor 6, it is arranged according to embodiment
For a pair of of aerial conductor.Conductor 5,6 is configured for charging current of the conduction with specific voltage.It is led according to embodiment, first
Rated voltage between body 5 and the second conductor 6 is 600V DC.
Conductor 5,6 is connected to electric system 3 via the first current collector 7 and the second current collector 8 being arranged on vehicle 1.Collection
Stream device 7,8 is made of according to embodiment two pantographs (pantograph), and pantograph is mounted on the roof of bus 1 simultaneously
And it is arranged to and is contacted respectively with the first conductor 5 and the formation of the second conductor 6.By this method, the onboard electric systems 3 of vehicle 1 can
Electric power is supplied, as being explained further below.
It should be noted that Fig. 1 shows the vehicle 1 in reduced form.According to embodiment, vehicle 1 is arranged to merely with motor 2
It is operated.Can in the car using motor in a manner of operating one or more wheels previously inherently it is known that and for
This reason, will not be described in greater detail herein.
(not shown) according to another embodiment, vehicle can be hybrid vehicle, for example, so-called plug-in mixing
Power type is connected to mutual internal combustion engine and motor equipped with via clutch.It then can alternately or concurrently use
Both internal combustion engine and motor operate vehicle.In the case of hybrid vehicle, also typically provides rechargeable electric energy and deposit
Storage system comprising battery pack.In addition, the present invention can use in the vehicle for only providing power by electric power.In such cases,
Vehicle can be provided that pantograph, be connected to aerial conductor for charging to battery pack so that vehicle can be not connected to
Specific range is travelled in the case of external power supply.
Battery pack provides the output dc voltage with required voltage level.Include the embodiment of rechargeable battery pack in vehicle
In, vehicle may be arranged such that such as stationary vehicle is motionless at bus master station or similar position for example at charging station
The charging of Shi Fasheng battery packs.As an alternative, charging can be carried out during the operation of vehicle, be especially used for battery in pantograph
In the case that group is connected to external power supply.
As described above, vehicle 1 includes onboard electric systems 3, it is configured to feed from external power supply 4 via conductor 5,6
Electric power.Electric system 3 is arranged in addition using phase inverter be to be suitable for motor 2 by the incoming voltage transformation on conductor 5,6
Voltage, usual 600V AC.Electric system 3 is additionally configured to bear the auxiliary that input voltage is transformed to be suitable in vehicle
Carry the level of (for example, heater, ventilation equipment etc.), usual 24V DC.In addition, electric system 3 is arranged to control vehicle 1
Power train motor 2 and other components operation.According to embodiment, pantograph 7,8 and trolley wire 5,6 are arranged in vehicle
Contact is formed during 1 operation.
Even if the disclosure refers to the vehicle 1 of bus form, but the present invention usually can utilize at least motor operation
Implement in almost any type of vehicle.Such vehicle includes car, bus, tramcar, haulage vehicle and train.
It, can be it is worth noting that, it can be arranged to trolley wire about conductor.As an alternative, the present invention can be used along road
The electric current of face arrangement passes the conductor of conductor rail form to implement.This device is configured to cooperate with one or more current collectors,
One or more current collectors can move and towards ground reduce, and can be configured to during the operation of vehicle with it is described
Electric current conducts electrical rail connection.The present invention can also be implemented using other types of conductor, for example, along vehicle side arrangement and
Current electrical wires corresponding with the suitable current collector on vehicle.
With reference to Fig. 2 embodiments of the present invention will be described in more detail, Fig. 2 be include above-mentioned motor 2, electric system 3, collection
It flows device 7,8 and is provided for monitoring the peace of the device 9 of certain other components of the electrical isolation resistance in the electric system 3
Row.
As explained above, external power supply 4 is provided with the first conductor 5 and the second conductor 6, is constituted according to embodiment for having
There is the conductor of the voltage of magnitude 600V.First current collector 7 is connected to the first input of electric system 3 via the first main contactor 10
Terminal, and the second current collector 8 is connected to the second input terminal of electric system 3 via the second main contactor 11.Main contactor 10,
Each of 11 constitute the high current repeater containing controllable switch.Both contactors 10,11 are connected to control unit 12,
It is configured to control the situation each switched.
According to embodiment, precharge unit 13 is connected in parallel with the second main contactor 11.The purposes of precharge unit 13 is
Originate the start-up mode of electric system 3 immediately when current collector 7,8 is connected to conductor 5,6.During this start-up mode, to coming
Current limit is carried out from the supply electric power of external power supply 4 so that when obtaining controlled rising of the input voltage during the starting stage
Between be very important.Do not have such " precharge ", the high voltage that bridging tentaculum 10,11 applies can cause that contactor can be damaged
10,11 and electric system 3 component electric arc.Thus, the purposes of precharge unit 13 is limited during above-mentioned power up phase
Inrush current.
In order to activate precharge unit 13 comprising connect with the precharge with controllable switch that resistor 15 is connected in series with
Tentaculum 14.Pre-charge contactor 14 is connected to control unit 12 according to two above-mentioned contactors 10,11 similar modes.
In addition, control unit 12 includes insulation resistance monitoring unit 16.Control unit 12 is connected to chassis earth point, but this
It is not shown.As initially referred to, pair monitored with onboard electric systems 3 and pantograph 7,8 associated insulation resistances
It is important.For this reason, insulation resistance monitoring unit 16 carries out being configured to ensure that two pantographs 7,8 in some way
Being electrically insulated between ground, as an alternative between the input terminal of electric system 3 and ground is sufficiently high.This utilizes insulation resistance
Monitoring unit 16 realizes that the insulation resistance monitoring unit 16 is configured for measuring insulation resistance.In practice, this is meaned
Insulation resistance should be as close possible to infinity.Pass through this monitoring of insulation resistance, it may be determined that electric system 3 or pantograph
7, whether 8 contain any defective FRU, inappropriate electrical isolation, carelessness ground connection or short circuit or similar electric defect.Insulation resistance is supervised
It can be configured to initiate burst emergency signals in the case where the insulation resistance detected is less than predetermined threshold depending on unit 16.
Insulation resistance monitoring unit 16 is associated with control unit 12, and in the connection of pantograph 7,8 and conductor 5,6 and
During disconnection, control unit 12 is configured to disconnect and be closed to form the first main contactor 10, the second main contactor 11 and preliminary filling
The switch of the part of electric unit 13.For this purpose, control unit 12 is additionally configured to the position of control pantograph 7,8,
That is, in some way so that it may be electrically connected to conductor 5,6 and is disconnected from conductor 5,6.It should be noted that Fig. 2 shows pantographs
7,8 it is under the situation that conductor 5,6 disconnects.Control unit 12 is utilized to carry out for controlling according to the particular order that will now be described
Pantograph 7,8 processed is connected and disconnected from situation and is additionally operable to the first main contactor 10 of control, the second main contactor 11 and preliminary filling
The process of electric unit 13.
As indicated in figure 2, make from the first conductor 5 and the second conductor 6 supply electric power via the first current collector 7 and warp
By the second current collector 8 to electric system 3 into line feed.The current collector 7,8 being made of pantograph according to embodiment is respectively via
One main contactor 10 and the second main contactor 11 are connected to electric system 3.Fig. 2 shows current collectors 7,8 to disconnect from two conductors 5,6
Situation.Under this situation, the first main contactor 10 and the second main contactor 11 are under its closed condition, and monitor electricity
Force system 3 includes the insulation resistance of current collector 7,8.Embodiment according to fig. 2 is also closed pre-charge contactor 14.As long as main
Contactor 10,11 is maintained under its closed condition, supports the monitoring of the insulation resistance of electric system 3.
When it is desirable that electric system 3 is connected to external power supply, main contactor 10,11 is arranged under its disconnection situation.
This is shown in FIG. 3, and Fig. 3 is also shown pre-charge contactor 14 and is arranged under its disconnection situation.Next step is shown in Fig. 4
That is current collector 7,8 is then controlled to be connected to corresponding conductor 5,6 by using control unit 12, at the same contactor 10,11,
14 are maintained under its disconnection situation.
Then, embodiment according to figure 5, pre-charge contactor 14 and the first main contactor 10 are closed together, from
And pre-charging stage is originated, as described above, the pre-charging stage is expected the electric power that limitation is supplied from external power supply 4 so that
The controlled rise time of input voltage is obtained during pre-charging stage.More precisely, the closure of pre-charge contactor 14 will be electric
Resistance device 15 is connected in parallel with the second main contactor 11.
Next step is shown, wherein be closed the second main contactor 11, this terminates pre-charging stage and by conductor in Fig. 6
5, both 6 onboard electric systems 3 are connected to.Under this situation, there is also to insulation resistance during the operation of electric system 3
Monitoring.
Electric system 3 is disconnected from external power supply 4 with opposite way implementation.First, by main contactor 10,11 and precharge
Contactor 14 is arranged under its disconnection situation.Next, current collector 7,8 is disconnected from conductor 5,6.Finally, by main contactor 10,
11 and pre-charge contactor 14 be arranged under its closed condition to monitor electrical isolation resistance.
Fig. 7 is the flow chart for showing program according to an embodiment of the invention.Initially, system is in external power supply 4 and does not connect
It is connected under the situation of onboard electric systems 3 and (is designated as in the figure 7 " step 17 ").This operating conditions corresponds to the disclosure of Fig. 2
Content, that is, the insulation resistance of monitoring electric system 3.
Next, (step 18) is arranged under its disconnection situation as connecting electric system 3 in main contactor 10,11
It is connected to the preparation of external power supply 4.In the embodiment that device 9 includes precharge unit 13, also by preliminary filling during this stage
Electric contactor 14 is arranged under its disconnection situation (step 18a).
Next, the first current collector 7 and the second current collector 8 are connected respectively to 6 (step of the first conductor 5 and the second conductor
19).This is executed while maintaining contactor 10,11,14 in its open position.
The next step of the process is to be closed 10 (step 20) of the first main contactor.Optionally, including precharge
In the embodiment of unit 13, it is also closed pre-charge contactor 14 (step 19a), is hereafter closed the second main contactor 11.With this side
Formula obtains during electric system 3 and the operation of vehicle 1 and continues monitoring (step 21) to insulation resistance.
Current collector 7,8 is disconnected from external power supply 4 with opposite way implementation, as explained above.
It should be appreciated that the embodiment shown in the present invention is not limited to above description and attached drawing；But technical staff will recognize that
It arrives, many changes and modifications can be made within the scope of the appended claims.
For example, embodiment shown in Fig. 2 to 6 includes above-mentioned precharge unit 13.It should be noted, however, that the present invention is unlimited
In such embodiment, but may include or include such precharge unit.
In addition, the present invention can with the electric conductor in trolley wire form as described above or be arranged in leading at ground level
Such as conductive rail of body or track are used together.In the latter cases, used current collector is in the form of armature contact,
It is continuously contacted with conductor rail during operation.The present invention can also be implemented together with the electric wire along the side arrangement of vehicle.
In addition, the present invention is suitable for the vehicle with the current collector continuously contacted with external power supply and is adapted for use with
Those of cell system capable of recharging with specified time interval charging vehicle.
Finally, the present invention can be implemented in the electric vehicle of the type of rail and trackless.
Claims (16)
1. method of the one kind for monitoring the electrical isolation resistance in electric system (3), the method includes：
Electric power is supplied from external power supply (4) via the first conductor (5) and the second conductor (6)；
The electric power is fed to the electric system (3) via the first current collector (7) and the second current collector (8), described first
Each of current collector (7) and second current collector (8) are configured to connect via the first main contactor (10) and the second master respectively
Tentaculum (11) is electrically connected to the electric system (3)；And
Monitor that the insulation resistance, the insulation resistance monitoring unit (16) are single with control using insulation resistance monitoring unit (16)
First (12) are associated and each of are connected to the main contactor (10,11)；
It is characterized in that, the method further includes：
The main contactor (10,11) is maintained to be in closed form when the current collector (7,8) is disconnected from the conductor (5,6)
State, to allow to monitor the insulation resistance；
It disconnects the main contactor (10,11) and the current collector (7,8) is then connected to the conductor (5,6)；And
It is closed the main contactor (10,11), to allow to monitor the insulation resistance.
2. according to the method described in claim 1, the method further includes：
After the described the step of current collector (7,8) is connected to the conductor (5,6) but described in the closure
Precharge unit (13) is activated before the step of main contactor (10,11).
3. according to the method described in claim 2, the method further includes：
The precharge unit is activated by being closed the switch (14) being connected in parallel with second main contactor (11)
(13)。
4. according to any method of the preceding claims, the method further includes：
Monitor the electrical isolation resistance in the electric system (3) of the voltage supply system form with vehicle (1).
5. according to any method of the preceding claims, the method further includes：
Via the first aerial pressure-wire (5) and the second aerial pressure-wire (6) or via the conductor along ground configuration from the outside
Power supply (4) supplies electric power.
6. according to any method of the preceding claims, the method further includes：
Using the first pantograph (7) and the second pantograph (8) feeding power to the electric system (3).
7. according to any method of the preceding claims, the method further includes：
The main contactor (10,11) is controlled using described control unit (12).
8. according to any method of the preceding claims, the method further includes：
The main contactor (10,11) is maintained to be in closed form when the current collector (7,8) is connected to the conductor (5,6)
State, to allow to monitor the insulation resistance；
It disconnects the main contactor (10,11) and then the current collector (7,8) and the conductor (5,6) is disconnected；
And
It is closed the main contactor (10,11), to allow to monitor the insulation resistance.
9. device (9) of the one kind for monitoring the electrical isolation resistance in electric system (3), and the device is via the first conductor
(5) and the second conductor (6) is connected to external power supply (4), and described device includes：First current collector (7) and the second current collector (8),
Each of described current collector is configured to be electrically connected to described lead via the first main contactor (10) and the second main contactor (11)
Body (5,6) and feeding power to the electric system (3)；And insulation resistance monitoring unit (16), insulation resistance prison
It is associated with control unit (12) depending on unit and each of be connected to the main contactor (10,11) for monitor it is described absolutely
Edge resistance；It is characterized in that, described control unit (12) is configured：When the current collector (7,8) is disconnected from the conductor (5,6)
When maintain the main contactor (10,11) to be in closed state, to monitor the insulation resistance；Disconnect the main contactor
(10,11) and the current collector (7,8) is then connected to the conductor (5,6)；And be closed the main contactor (10,
11), to monitor the insulation resistance.
10. device (9) according to claim 9, wherein described device includes precharge unit (13), the precharge list
First (13) have concatenated controllable switch (14) and resistance (15), the precharge unit (13) and second main contactor
(11) coupled in parallel.
11. device (9) according to claim 9 or 10, wherein the electric system (3) is supplied by the voltage in vehicle (1)
System is answered to constitute.
12. the device (9) according to any one of claim 9 to 11, wherein first current collector (7) and described second
Each of current collector (8) is made of pantograph.
13. a kind of vehicle (1) comprising be used to monitor in electric system (3) according to any one of claim 9 to 12
Electrical isolation resistance device.
14. a kind of computer program comprising for when on computers run described program when execute according to claim 1 to
The program code devices of method and step described in any one of 8.
15. a kind of computer-readable medium of carry computer program, the computer program includes for ought be on computers
The program code devices of step according to any one of claim 1 to 8 are executed when running described program product.
16. a kind of control unit (12), the electrical isolation resistance for being used to monitor in electric system (3) and it is configured to execute root
The step of according to method described in any item of the claim 1 to 8.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/EP2015/081028 WO2017108107A1 (en) | 2015-12-22 | 2015-12-22 | A method and system for monitoring electrical insulation resistance in an electric system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108473057A true CN108473057A (en) | 2018-08-31 |
| CN108473057B CN108473057B (en) | 2022-04-05 |
Family
ID=55071012
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201580085464.XA Active CN108473057B (en) | 2015-12-22 | 2015-12-22 | Method and system for monitoring electrical insulation resistance in an electrical power system |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US10913357B2 (en) |
| EP (1) | EP3393844B1 (en) |
| JP (1) | JP6714705B2 (en) |
| CN (1) | CN108473057B (en) |
| WO (1) | WO2017108107A1 (en) |
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| CN113176446A (en) * | 2021-04-30 | 2021-07-27 | 三一重机有限公司 | Working machine insulation detection method, device and system and working machine |
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| EP3929597A1 (en) * | 2020-06-23 | 2021-12-29 | Volvo Truck Corporation | An electric insulation monitoring arrangement |
| DE102020211048A1 (en) * | 2020-09-02 | 2022-03-03 | Siemens Mobility GmbH | Arrangement with a voltage module |
| CN113238124B (en) * | 2021-03-29 | 2022-09-13 | 中车青岛四方机车车辆股份有限公司 | Alternating current insulation detection system and method and railway vehicle |
| DE102021207041A1 (en) | 2021-07-05 | 2023-01-05 | Siemens Mobility GmbH | Electrically powered motor vehicle and method for operating the same |
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Also Published As
| Publication number | Publication date |
|---|---|
| EP3393844B1 (en) | 2021-10-27 |
| WO2017108107A1 (en) | 2017-06-29 |
| CN108473057B (en) | 2022-04-05 |
| JP2019506118A (en) | 2019-02-28 |
| JP6714705B2 (en) | 2020-06-24 |
| US20190001821A1 (en) | 2019-01-03 |
| US10913357B2 (en) | 2021-02-09 |
| EP3393844A1 (en) | 2018-10-31 |
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